US3142799A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High frequency voltmeter utilizing self-balancing loop
Assignee: HP Inc
•
Filing: 1960-09-21
•
Granted: 1964-07-28
•
Expires: 1980-09-21
Abstract
No abstract record available.
Inventors
- 👤 Nicholas N Kovalevski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:24
CPC Classifications
G; G01; G01R; G01R19/00; G01R19/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
HIGH FREQUENCY SIGNAL APPARATUS COMPRISING A FIRST TRANSDUCER TO PRODUCE A FIRST D.-C. VOLTAGE RELATED TO THE AMPLITUDE OF AN APPLIED SIGNAL, CIRCUIT MEANS TO PRODUCE AN ALTERNATING OUTPUT SIGNAL HAVING AN AMPLITUDE THAT IS RELATED TO A VOLTAGE APPLIED THERETO, INDICATING MEANS, MEANS TO APPLY SAID ALTERNATING OUTPUT SIGNAL TO SAID INDICATING MEANS TO PRODUCE AN INDICATION OF THE AMPLITUDE OF SAID ALTERNATING OUTPUT SIGNAL, A SECOND TRANSDUCER CONNECTED TO RECEIVE SAID ALTERNATING OUTPUT SIGNAL FOR PRODUCING A SECOND D.-C. VOLTAGE THAT IS RELATED TO THE AMPLITUDE OF SAID ALTERNATING OUTPUT SIGNAL, MEANS TO PRODUCE AN ERROR SIGNAL RELATED TO THE COMBINATION OF SAID FIRST AND SECOND D.-C. VOLTAGES, AND MEANS CONNECTED TO SAID CIRCUIT MEANS FOR APPLYING SAID ERROR SIGNAL THERETO.
Claim 2
Dependent Claim
123 words
HIGH FREQUENCY SIGNAL APPARATUS COMPRISING A FIRST TRANSDUCER TO PRODUCE A FIRST D.-C. VOLTAGE RELATED TO THE AMPLITUDE OF AN APPLIED SIGNAL, CIRCUIT MEANS TO PRODUCE AN ALTERNATING OUTPUT SIGNAL HAVING AN AMPLITUDE THAT IS RELATED TO A VOLTAGE APPLIED THERETO, INDICATING MEANS, MEANS TO APPLY SAID ALTERNATING OUTPUT SIGNAL TO SAID INDICATING MEANS TO PRODUCE AN INDICATION OF THE AMPLITUDE OF SAID ALTERNATING OUTPUT SIGNAL, A SECOND TRANSDUCER CONNECTED TO RECEIVE SAID ALTERNATING OUTPUT SIGNAL FOR PRODUCING A SECOND D.-C. VOLTAGE THAT IS RELATED TO THE AMPLITUDE OF SAID ALTERNATING OUTPUT SIGNAL, MEANS TO PRODUCE AN ERROR SIGNAL RELATED TO THE COMBINATION OF SAID FIRST AND SECOND D.-C. VOLTAGES, AND MEANS CONNECTED TO SAID CIRCUIT MEANS FOR APPLYING SAID ERROR SIGNAL THERETO.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-07-28 | 1968-01-27 | 1968-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-28 | 1972-01-27 | 1972-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-28 | 1976-01-27 | 1976-07-28 | $7700.00 | Window Closed / Lapsed |